major difference would be the mode spacing and the availability of a deep carry pocket clip. Personally I prefer the t10 mode spacing. E12 50 lumen to 130 lumen, I wouldn't see anyany real significance difference in terms of visual output.
To be honest, unless you're looking specifically for SS or titanium. Both are good choices.
Yeah I figured that but I can only choose one and I hate it when this happens...
I think I'm leaning towards making my own pocket clip and getting the E12 because I found that it even looks brighter that the T10 (on camera that is). Still dunno.